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EP1255411A3 - Tone Relay - Google Patents

Tone Relay Download PDF

Info

Publication number
EP1255411A3
EP1255411A3 EP02090146A EP02090146A EP1255411A3 EP 1255411 A3 EP1255411 A3 EP 1255411A3 EP 02090146 A EP02090146 A EP 02090146A EP 02090146 A EP02090146 A EP 02090146A EP 1255411 A3 EP1255411 A3 EP 1255411A3
Authority
EP
European Patent Office
Prior art keywords
tone
tones
communication signal
forwarding
signals
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP02090146A
Other languages
German (de)
French (fr)
Other versions
EP1255411A2 (en
EP1255411B1 (en
Inventor
Scott Branden
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Broadcom Corp
Original Assignee
Broadcom Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Broadcom Corp filed Critical Broadcom Corp
Publication of EP1255411A2 publication Critical patent/EP1255411A2/en
Publication of EP1255411A3 publication Critical patent/EP1255411A3/en
Application granted granted Critical
Publication of EP1255411B1 publication Critical patent/EP1255411B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/12—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal
    • H04M7/1205—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal where the types of switching equipement comprises PSTN/ISDN equipment and switching equipment of networks other than PSTN/ISDN, e.g. Internet Protocol networks
    • H04M7/1295—Details of dual tone multiple frequency signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/46—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies comprising means for distinguishing between a signalling current of predetermined frequency and a complex current containing that frequency, e.g. speech current

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Electrophonic Musical Instruments (AREA)

Abstract

A system and method for detecting and removing tones from an incoming communications channel that may also carry other signals such as, for example, voice is disclosed which includes pre-detecting tones (20) in a communication signal, processing the communication signal to invalidate the tones in response to the tone pre-detection (50), forwarding the processed communication signal across a network (60), validating the tone (40) and forwarding tone-on signals across the network in response to the validation (80).
EP02090146A 2001-04-18 2002-04-19 Tone Relay Expired - Lifetime EP1255411B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US933035 1978-08-11
US28496901P 2001-04-18 2001-04-18
US284969 2001-04-18
US09/933,035 US7035293B2 (en) 2001-04-18 2001-08-20 Tone relay

Publications (3)

Publication Number Publication Date
EP1255411A2 EP1255411A2 (en) 2002-11-06
EP1255411A3 true EP1255411A3 (en) 2005-11-23
EP1255411B1 EP1255411B1 (en) 2008-04-23

Family

ID=26962919

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02090146A Expired - Lifetime EP1255411B1 (en) 2001-04-18 2002-04-19 Tone Relay

Country Status (4)

Country Link
US (1) US7035293B2 (en)
EP (1) EP1255411B1 (en)
AT (1) ATE393543T1 (en)
DE (1) DE60226195T2 (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7684383B1 (en) * 2002-01-30 2010-03-23 3Com Corporation Method and system for dynamic call type detection for circuit and packet switched networks
US20030194082A1 (en) * 2002-04-15 2003-10-16 Eli Shoval Method and apparatus for transmitting signaling tones over a packet switched network
US7388954B2 (en) * 2002-06-24 2008-06-17 Freescale Semiconductor, Inc. Method and apparatus for tone indication
US7242762B2 (en) * 2002-06-24 2007-07-10 Freescale Semiconductor, Inc. Monitoring and control of an adaptive filter in a communication system
US7215765B2 (en) 2002-06-24 2007-05-08 Freescale Semiconductor, Inc. Method and apparatus for pure delay estimation in a communication system
EP1395065B1 (en) 2002-08-28 2007-01-24 Freescale Semiconductor, Inc. Tone detector and method therefor
US7269142B2 (en) * 2002-11-27 2007-09-11 Intel Corporation Managing tone clamping in a network
CN100456759C (en) * 2003-08-11 2009-01-28 华为技术有限公司 Method for realizing dual-tone multifrequency signal silence
US7486665B2 (en) * 2004-10-14 2009-02-03 Cisco Technology, Inc. Transport of DTMF tones over VOATM/VOIP networks
JP4862262B2 (en) * 2005-02-14 2012-01-25 日本電気株式会社 DTMF signal processing method, processing device, relay device, and communication terminal device
US7747013B2 (en) * 2005-02-24 2010-06-29 Mitel Networks Corporation Early detection system and method for encrypted signals within packet networks
US7924890B2 (en) * 2006-02-13 2011-04-12 Cisco Technology, Inc. Apparatus and method for increasing reliability of data sensitive to packet loss
US20080137650A1 (en) * 2006-12-11 2008-06-12 Parameswaran Kumarasamy Conversion of dtmf carrying ip packets
US8681824B2 (en) * 2008-03-14 2014-03-25 Freeascale Semiconductor, Inc. DTMF tone monitoring apparatus and method of identifying a DTMF tone
GB2461890B (en) 2008-07-16 2011-03-02 Tunstall Group Ltd Tone signalling
US8804553B2 (en) * 2009-05-14 2014-08-12 Freescale Semiconductor, Inc. Tone relay system and method
NL1037238C2 (en) * 2009-08-31 2011-03-03 V S N Beheer B V A method of and a device for quantifying a tone signal received in a telecommunications network.
US8730852B2 (en) * 2009-12-11 2014-05-20 At&T Intellectual Property I, L.P. Eliminating false audio associated with VoIP communications
US20120063355A1 (en) * 2010-09-14 2012-03-15 Research In Motion Limited Apparatus, and associated method, for providing support-call data pursuant to a wireless device support call
FR3034935B1 (en) * 2015-04-10 2017-05-05 Thales Sa METHOD OF REDUCING THE FACTOR CREATED BY MULTICHANNEL TRANSMISSION BY INTELLIGENT AND ADAPTIVE SCREENING / FILTERING

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000005905A2 (en) * 1998-07-24 2000-02-03 3Com Corporation System and method for efficiently transporting dual-tone multi-frequency/multiple frequency (dtmf/mf) tones in a telephone connection on a network-based telephone system
WO2001013586A1 (en) * 1999-08-12 2001-02-22 Telogy Networks, Inc. Fast dtmf identification

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5572588A (en) * 1994-07-05 1996-11-05 Motorola, Inc. Method and apparatus for detecting reception of a tone signal
EP0734185A2 (en) * 1995-03-23 1996-09-25 Hughes Electronics DTMF tone transmission in a voice communication system
US6650662B1 (en) * 1997-12-12 2003-11-18 International Business Machines Corporation Method and system for transmitting a DTMF signal with compressed voice in a packet switching network
JP2000069509A (en) * 1998-08-18 2000-03-03 Oki Electric Ind Co Ltd Dtmf detector
US6400709B1 (en) * 1998-12-02 2002-06-04 Intel Corporation DTMF detection in internet telephony
DK1141948T3 (en) * 1999-01-07 2007-08-13 Tellabs Operations Inc Method and apparatus for adaptive noise suppression
US7003093B2 (en) * 2000-09-08 2006-02-21 Intel Corporation Tone detection for integrated telecommunications processing

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000005905A2 (en) * 1998-07-24 2000-02-03 3Com Corporation System and method for efficiently transporting dual-tone multi-frequency/multiple frequency (dtmf/mf) tones in a telephone connection on a network-based telephone system
WO2001013586A1 (en) * 1999-08-12 2001-02-22 Telogy Networks, Inc. Fast dtmf identification

Also Published As

Publication number Publication date
EP1255411A2 (en) 2002-11-06
US7035293B2 (en) 2006-04-25
DE60226195T2 (en) 2009-05-28
US20020154760A1 (en) 2002-10-24
EP1255411B1 (en) 2008-04-23
DE60226195D1 (en) 2008-06-05
ATE393543T1 (en) 2008-05-15

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